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Stable factors in chronic pain.

R C Tait1, J T Chibnall, P N Duckro

  • 1Department of Psychiatry and Human Behavior, St. Louis University School of Medicine, MO 63104.

The Clinical Journal of Pain
|December 1, 1989
PubMed
Summary

This study identified stable dimensions of the chronic pain experience, including psychological distress, disability, pain sensation, and history, using principal components analysis in 444 patients.

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Area of Science:

  • Psychology
  • Pain Medicine
  • Biostatistics

Background:

  • Chronic pain is a complex, multifaceted experience.
  • Understanding its core components is crucial for effective treatment.
  • Previous research has explored various aspects of chronic pain.

Purpose of the Study:

  • To identify and characterize the fundamental dimensions of the chronic pain experience.
  • To determine if these dimensions are stable across different patient subgroups.
  • To provide a framework for future research and clinical interventions in chronic pain.

Main Methods:

  • Principal components analysis (PCA) was applied to self-report measures from 444 chronic pain patients.
  • The patient sample was divided into two groups for independent analysis.

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  • Factor analysis was used to identify underlying dimensions within each group.

    • Main Results:

    • Four stable factors emerged in one group, explaining 57.6% of the variance: psychological distress, pain-related disability, pain description, and pain history.
    • Five stable factors emerged in the second group, explaining 64.2% of the variance: psychological distress, disability, pain intensity, pain sensation, and pain history.
    • Significant overlap in identified factors across groups suggests robust dimensions of the chronic pain experience.

    Conclusions:

    • The study identified key, stable dimensions characterizing the chronic pain experience.
    • These dimensions include psychological distress, disability, pain characteristics (sensation, description, intensity), and pain history.
    • Findings support the utility of PCA in delineating chronic pain components and have implications for research and clinical practice.